Machine for making metallic roofing



2. H Tl- DW. H T U G A. ..L

(No Model.)

MACHINE FOR MAKING METALLIC ROOI'ING.

Patented May .26, 1885.

Attorneys 2 Sheets-Sheet 2.

(No Model.)

P. A. GUTHRIE.

MACHINE IOR MAKING METALLIC ROOIING.

Patented May 26, jg.

Uiviren Sra'rns l arent trice.

FRANK AUGUSTUS GUTHRIE, OF GALLIPOLIS, OHIO.

MACHlNE FOR MAKING METALLIC ROOFING.

SPECIFICATION' forming part of Letters Patent No. 318,559, dated M'ay 26, IESS.

Application filed September 20, 1884. (No model.)

T0 all whom it 11i/Cty concern:

Be it known that I, FRANK A. GUTHRIE, a citizen of the United States, residing at Gal lipolis,in the county ofGallia and State of Ohio, have invented a new and useful Machine for Making Metallic Roofing, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to machines for making metallic roong; and it has for its object to provide means for this purpose which may be operated with ease and rapidity to bend the sheet metal without breaking it.

A further object of the invention is to prov vide means for readily introducing the metal into the machine, holding it rmly .in position while being acted upon, and withdrawing it therefrom when the proper bend has been made.

Vith these ends in view the said invention consists in certain details of construction and combination of parts, as hereinafter set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure I is a perspective view showing the machine in position preparatory to introducing the sheet metal, the raised platform being in the elevated position. Fig. 2 is a longitudinal sectional view showing the machine in position after the metal has been introduced and the first bend made by the lower bending tool or knife. Fig. 3 is a longitudinal sectional view showing the second bend made by the upper bending tool or knife. Fig. 4 is a side elevation of the machine in the position shown in Fig. 3, parts being indicated in dotted lines. Fig. 5 is a detached view showing more clearly the arrangement of the interlocking rods. Fig. 6 illustrates the first action of the machine on the sheet metal, and Fig. 7 illustrates the final action.

Like letters are used to indicate corresponding parts in the several gures.

Referring to the drawings, A designates the frame of my improved machine, consisting of upright corner posts or standards, a a, resting upon and secured to base-blocks b b, and connected by longitudinal bars c c and transverse bars d d.

B designates a stationary table having notches at its corners to lit around and between the posts c a', and secured to the trans verse bars d d, said table providing a rest for the sheet metal while being acted upon.

C designates a movable platform having notches c e formed in its sides, near the corners, to receive the corner-posts c c', the notches forming fiauges ff, which fit over the outer face of said posts and guide the platform in its movements. It will be seen that this platform serves as a means for clamping the sheet metal against the table, and for this purpose it is provided with means for holding it down in position and for raising the same when the machine has completed its operation, as will be hereinafter described.

To the longitudinal bars c c" are pivoted shafts D D', one at each end of the machine, having depending bars E E, two on each shaft, the lower end ofthe bars carrying shoes F F',

which engage with the upper face Of the ris-- ing platform C. A rod, G, connects the bars E, so as to brace the same, and a lever, H, is pivoted to one of the shafts D, and is arranged to operate the same, and the other shaft to force the bars E E simultaneously down in position, as seen in Fig. 2. The bars with their operating devices are shown in the elevated position in Fig. I, so as to permit the raising of the platform.

I l designate a pair of shafts having their` ends j ournaled in boxes attached to the sides of the cornerposts a c', the body of the shafts being square in cross-section, the ilatbeuding knives or tools J J being secured to the lower side of the shaft, projecting outwardly therefrom and inclining slightly inward.

Arms O O are secured on the shaft at each end beyond the frame, and are adapted to engage with the under side of the platform, below the flanges ff', one of the ends of the shafts I I having gear-wheels K K mounted thereon and engaging with each other, a pinion, L, attached to a shaft, M, journaled in the transverse bars cl d, imparting inotiomby means of a crank, T, to the wheel K, which motion is transmitted to the other wheel.

It will be observed that by the operation of the crank-handle motion is communicated to the gear-wheels by the pinion L, causing the turning of the shafts II, the arms O O bearing against the under side of the plat-form at each IOO of the four corners, the continued turning of the shafts raising the arms to elevate the platform into the position shown in Fig. 1, preparatory to introducing the sheet metal.

P P designate shafts similar to the shafts I I, journaled in boxes secured to the side of the pos'ts a,- one end of the shafts P Phaving gearwheels Q Q mounted thereon and engaging with each other. A shaft, R, is mounted in the bars d d', and carries a pinion, S, engaging with one of the gear-wheels, a crank-handie, T, imparting motion to the shaft of the pinion; The shafts P P are square in crosssection, and have the upper fiat bendingknives,U U,secured to the inner side thereof and projecting outwardly therefrom, said knives being employed to make the final bend to the metal.

VV designate brace-rods,secured to the upper face of the platform at each side, and having hooks i i formed on its ends, which engage with the shafts I I at the cut-away portion Z. Corresponding hooked brace-rods W W are secured to upright bars projecting from the sills K X', the hooks of the rods V `W interlocking with each other when the platform is lowered into position for operation. In this manner the platform will be braced and held down, no matter what the pressure may be against the metal in bending. As seen, the hooks meet together at the cut-away or reduced portion Z of the knives J J, and interlock with each other, the construction being such that the knives will be at libertyto revolve in bending the metal.

The operation of my invention will be readily understood from the foregoing description, taken in connection with the Vannexed drawings.

The platform C is raised by the operation of the gear-wheels K K to revolve the shafts I I and cause the arms O O to force the platform upward into the position shown in Fig. 1. Since the arms O O bear against the under side of the platform at the four corners, at which points it is guided bythe corner-posts a a', said platform will be elevated gradually, yet positively, into the proper'position, where it will be upheld by the aforesaid arms. The sheet metal is then laid on the table B so that either one or both ends will project sufficiently beyond the edge of the table to provide the necessary bend. The platform is then lowered by the operation of crank T, moving the pinion L and driving the gear-wheels K K to rotate the shafts I I, and when the platform has reached its limit of movement the lever H is operated to turn the shafts D D', causing the bars E E to be thrown'into a vertical position, the shoes F F bearing against the upper face of the platform and binding it down. As the platform reaches the table B the hooked bracerods V WV interlock and serve as an additional means for holding the platform from upward movement. As seen, the sheet metal is clamped between the table and the platform, its end projecting outwa'rd a sufficient distance therefrom to provide the necessary bend. By the continued movement of the shafts I I', through the intermediate gearing aforesaid, the lower knives, J J are brought up into the position shown in Fig. 2, to bend the projecting end of the metal in an upward direction against the edge of the table and platform. The metal has been bent by this operation into the form shown in Fig. 6. To complete the bend, the gear-wheels Q Q are operated by the pinion S, through the crank-handle T, to cause the revolution of the shafts P P and the forcing of the knives U U against the turned-up edge of the metal, said knives pressing or bending the edge over the lower knives, J J, into the form shown in Fig. 7. The final operation of the machine is illustrated in Fig. 3. When the bend has been completed, the bars E are raised by the lever H to withdraw the shoes F F from the platform C, the latter being raised by the arms or cams O O in the manner hereinbefore stated.

It will be seen that by the construction shown I am enabled to bend both sides of the metal in the same direction by the simultaneous action of the two sets of bending-knives. This bending is accomplished ina slow and gradual manner without breaking. For this reason I am enabled to bend cold-blast or stone-coal iron, which hitherto occasioned considerable waste of time and labor in bending, and there is no possibility of breaking it.

It will also be observed that the platform will be held securely down in position by the means shown and described, and will also be provided with means for raising or lowering said platform as desired.

As seen, the boxes in which the shafts I I are j ournaled are smaller than the boxes forming the journals of the shafts P P, thereby setting the latter farther out, so that its knives U U will give the requisite three-sixteenths of an inch bend to the metal. This bend or cap will present a round smooth surface without breaks or abrasions.

The machine is simple in construction, positive in its actions, and may be operated with ease and rapidity to effect the properloending of the metal. It is inexpensive in construction, and cannot work out of order, and may be operated by hand or steam.

Having described my invention, I claim- 1. In a sheet-metal-bending machine, the combination, with the table, its supportingframe, and means for clamping the metal against the table, of shafts carrying bendingknives, arranged in an upper and lower series and journaled in boxes, the boxes of the upper series being set out beyond the boxes of the lower series, and means, substantially as described, for operating the knives of each set, as set forth.

2. In a machine for bending sheet metal, the combination, with its supporting-frame, of the clamping-platform cut out or recessed at or near the corners to work between and fit around the posts of the frame, knives for bending the IOO IIO

sheet metal, the shafts on Which the knives are mounted, and arms or cams on the ends of the shafts and actuated by the movement thereof to hear against the projecting ends of the platform, as set forth.

3. In a sheetmetal-bending machine, the combination, with the table and its supporting-frame, of the platform, means for looking it down against the table, knives for bending the sheet metal, the shafts on which the knives are secured, a set of gearing to operate the shafts, and arms or cams carried by the latter to bear against the under side of the platform and elevate the latter after the knives have completed the successive operations, as set forth.

4. In a machine for making metallic roofing, the combination, with the table and its supporting-frame, of the platform carrying hooked rods at the sides, and hooked rods attached to the frame and adapted to interlock with the rods of the platform, as set forth.

5. In a machine for making metallic .roofing, the combination, with the table and its supporting-frame, of the platform for clamping the metal against the table, devices for locking the platform down in position, shafts journaled in the supportingframe at each side, one above the other, bending-knives secured to the shafts, gear-Wheels mounted on the shafts, a pinion for imparting motion to the gear-Wheels, and a crank-handle for transmitting motion to the pinion, as set forth.

In testimony that I claim the foregoing as my Aown I have hereto affixed my signature in presence of two Witnesses.

FRANK AUGUSTUS GUTHRIE.

Witnesses:

W. S. MATTHEWS, NVM. A. DENNIS. 

